题解 | #查找兄弟单词#

把目标单词取出并排序，然后分别对比词典里的单词（同样要进行字符排序），把符合条件的兄弟单词加入列表，经过排序输出即可。

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        String strs[] = str.split(" ");
        int len = Integer.parseInt(strs[0]);
        String words[] = new String[len];
        int i=1;
        for(;i<=len;++i)
            words[i-1] = strs[i];
        String target = strs[i++];
        int order = Integer.parseInt(strs[i]);
        char[]chs = target.toCharArray();
        Arrays.sort(chs);
        String sorttarget = new String(chs);
        List<String> list = new ArrayList<>();
        for(int j = 1;j<=len;++j){
            if(!strs[j].equals(target)&&judge(strs[j],sorttarget))
                list.add(strs[j]);
        }
        Collections.sort(list,new Comparator<String>(){
           public int compare(String s1,String s2){
               return s1.compareTo(s2);
           } 
        });
        if(order<list.size())
            System.out.print(list.size()+"\n"+list.get(order-1));
        else System.out.println(list.size());
        
    }
    public static boolean judge(String s,String target){
        char chs [] = s.toCharArray();
        Arrays.sort(chs);
        if(new String(chs).equals(target))return true;
        return false;
    }
}